Release 0.40.0-rc.1

• Milestone: https://github.com/golang/vscode-go/issues?q=milestone%3Av0.40.0

• Commits: https://github.com/golang/vscode-go/compare/v0.39.1..v0.40.0-rc.1

• How to test prerelease

  • Download the .vsix file from this Releases page.
  • Navigate to the Extensions view in VS Code (Ctrl+Shift+X). Click on the "..." in the top-right corner, select "Install from VSIX", and select the .vsix file you downloaded. Alternatively, you can run code --install-extension Go-latest.vsix or open the Command Palette and run the "Extensions: Install from VSIX..." command.
  • If prompted, reload VS Code.